Description, qualifying comments, and acceptable water years.
Drainage area is 5150 sq.mi. Datum is 510.86 ft.
Located in hydrologic unit 07120001 at Latitude: 41:20:48N Longitude: 088:11:11W
Station is in the state of IL (county code 197) and serviced by the IL office.
Channel slope is 1.27 feet/mile
Stream length is 151.00 miles
Mean basin elevation is 701.00 feet above National Geodetic Vertical Datum
Percent of contributing drainage area covered by
Storage: 0.37% Lakes: N.A.% Forests: 7.35% Glaciers: N.A.%
Soil infiltration index is 2.50 inches
Annual precipitation is 33.50 inches
Precipitation intensity is 2.80 inches/24 hour (expected on the average once each two years)
January minimum temperature is 17.00 degrees Fahrenheit
Comments and qualifications on the data:
Slight diurnal fluctuations at low flow caused by upstream powerplants: records should not be used for analysis at
less than monthly resolution.
Monthly and longer averages for 73 water years are acceptable (all years except partial years).
A water year with acceptable data is indicated by an asterisk in the time line, which spans 1874 through 1988.
Water year
1 1 1 1 1 1 1 1 1 1 1 1 1
8 8 8 9 9 9 9 9 9 9 9 9 9
7 8 9 0 1 2 3 4 5 6 7 8 8
4-----0----5----0----5----0----5----0----5----0----5----0----5----0----5----0----5----0----5----0----5----0----5--8
..........................................*************************************************************************
The streamflow data
Daily values, monthly mean values, and yearly mean values
of streamflow data are available in tablular form.
Select the desired option from the list below.
a. Table of daily data (252K text)
b. Table of monthly data
c. Table of annual data
The data tables do not have column heading for ease of reading into statistical programs.
For a detailed description of the format of the data tables,
select the corresponding file from the list below.
a. Format of the daily data table
b. Format of the monthly data table
c. Format of the yearly data table